For me the update worked pretty simple,easy and fast without any problems. i had to activate the testing repo because of some dependencies.
I saw there was also a dependency on a nokia maps thingy?

First thing i noticed, i was browsing, and my ring ring feels fast!
I had 7 browsers with various forums, facebook site and translator app active!
normally they would hang around, switching from one to another needed around a minute until I was able to navigate to the next page to wait for the next one.
Now it is like zappedi zapp, part of a second schawum, i can scroll fluently and do things! I guess this will make my ring ring stay longer without recharging.
before I needed most of the battery to wait while watching the screen hanging around.
Up to now it I am happy like a little boy at christmas, because of the slow speed I thought about buying a second ring ring. but to be honest, there is nothing else I'd like to own for the moment.